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The authors investigate the relationship between constitutional design and the rule of law in emerging democracies. The authors provide a formal logic to the Madisonian assertion that increasing the number of veto players strengthens the rule of law. The model shows that as the number of veto players in government increases, their ability to collude on accepting bribes decreases; therefore, their incentive to vote on legislation strengthening the rule of law increases. The authors classify governments according to the number of veto players, following the logic proposed by Tsebelis. The authors test hypotheses derived from their model on 35 emerging democracies using veto-player data that they gathered for the analyses. The authors find that systems with multiple veto players have higher levels of the rule of law. Furthermore, independent of the number of veto players, presidential systems have lower levels of the rule of law than do parliamentary systems.

The premise that parties are fundamentally motivated by office-seeking is common, but surprisingly little attention has been paid to its empirical validity. We approach this issue by analysing how parties respond to their electoral performance. Casting party leaders as the embodiment of their parties, we then examine the degree to which the length of time party leaders retain their position hinges on their party's electoral success, defined with reference both to the party's share of legislative seats and to its presence or absence in government. Our analyses centre on six parliamentary democracies in which the government is always formed by one of the two major parties either alone or in coalition with a minor party (Australia, Britain, Canada, Germany, Ireland and New Zealand) in the years from 1945 through 2000. Results indicate that party leaders' risk of removal hinges substantially on their party's seat share and/or their party's presence in government. More specifically, we find that as the seat share of both major and minor parties increases, the chance that the party leader will be removed decreases. Likewise, if a major party loses its role in government, the chance that the party leader will be removed increases dramatically. Although presence in government has no significant impact on the tenure in office of party leaders of minor parties, the magnitude of the effect is indistinguishable from that for major parties. Beyond providing strong evidence that parties are at their core motivated by electoral performance, we also estimate the magnitude of the electoral imperative, at least as it pertains to party leaders.

Using the Comparative Manifesto Project (CMP) data for twenty established parliamentary democracies, the authors have studied the relationship between number of parties in a party system and party dispersion. They found that as the number of parties in the system increases, the dispersion of parties also increases, but only up to a point. The boundaries of a finite issue space appear to expand up to at most five parties. In addition, once the number of parties in the party system was controlled for, they found that electoral rules have no direct effect on party dispersion. Thus, their findings validate the theoretical predictions of spatial theory while at the same time highlighting surprising ways in which the policy space is constrained.

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